<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        header,footer{
    
        }
    </style>
</head>
<body>
    <header>header</header>
    <main>
        <aside>菜单</aside>
        <section>
            内容
        </section>
        <footer>

        </footer>
    </main>
</body>
</html>